Automatic auxiliary air-supply device for internal-combustion engines.



AUTOMATIC AUXILIARY AI E. G. HODGESA R SUPPLY DEVICE FOR INTERNALCOMBUSTION ENGINES. APPLICATKON HLED Ame. 191a.

Patented Apr. 15, 1919.

' To all whom it may concern:

- nnwann e. Homes, on mansnatmown, IOWA.

AUTOMATIC AUXILIARY,AIR-SUPPLY DEVICE FOR INTERNAL-COMBUSTION ENGINES.

Be it known that. I, EDWARD G. House's, av citizen of theUnited'Stat/es, and resident of Marshalltown, in the county of Marshalland State of Iowa, hav invented a certain. new 41nd usefulAutomatic'Auxiliary Air- Supply Device for Internal-Combustion Engines,of which the following is a specification. r

The I object. of my invention is to pro vide an automatic auxiliary airdevice adapted for use with internal combustion engines for. supplyingair to the fuel mixture, which device is of very simple, durable andinexpensive construction and is so constructed and arranged that it maybe readily and easily mounted on or removed from. any ordinary explosiveengine.

A further object is to make such a device in the form of an attachmentso that it may be readily adapted for use withengines of dilierentmakes.

More particularly it is my object to provide such a device including areadily adjustable air supply pipe having a flaring or bell-shaped endadapted to receive air, and provided with a buttenliy valve and anengaging stop therefor, and a. shield member adapted to protect one sideof the butterfly valve from the pressure of air lasts passing throughsaid air supply pipe.

With these and other objectsin view my invention consists in theconstruction, ar-

rangement and combination of the various parts of the device, wherebythe objects contemplatedare attained, as hereinafter more filly setforth, pointed out in my claims and illustrated in the accompanyingdrawings, in which:

Figure Lshows a side elevation of an engine block having mounted thereonmy i- 'nproved automatic auxiliary air supply device.

Fig. 2 shows an enlarged, vertical,v sectional view through that portionof the air supply pipe having the butterfly valve and through thechamber in which the auxiliary air and fuel mixture are-mixed.

Fig. 3, shows a horizontal, sectional. view taken on the line 3-3 ofFig. l; and

i Fig. -l shows a detail, plan view with parts Specification of LettersPatent. Patg fmd A 15 1913; Application filed April 6, 191a.

Serial No. 227,155.

are preferably staggeredwith relation to the rows of openings in thelower tube.

I provide also a. flexible fuel conducting tube 17 having a flaring end18 preferably located at a suitable point to receive the air from thefan 11 and the air rushing in through the radiator.

Connected with the tube 15 is a short tube 19. An intermediate tube 20is screwed to half of said the ends of the respective tubes 19 and 17,

Received within the as shown in Fig. tube 20 is a butterfly valve 21. Itwill thus appear that the tube 20 forms a valve casing. VVit-hin thevalve casing 20 is a stop 22 'for limiting toe movement of the valve 21in one direction,

The stop 22 forms a seat for the valve 21 for approximately onehalfthe-circumfe= ence thereof. The valve casing 20 is provided-with a rowof small holes 523 near the valve 21 when the latter is closed on. the

side thereof next to the intake end of'the- -valve casing.

lVithin the shield 24 for protecting that half'of the valve 21 whichcoacts with the seat 22, from contart with a current of air "passingthrough the air simply-pipe 17 from. the flaring end thereof, andfor-guiding the air and directing it against. the other half of thevalve.

It will he noted .thatwv'hilb under uorma conditions, when the/engineisnot running, the underside of the shield 2.4. is, in a sense. suhjcrtto atmospheric pressure, because air will enter the, valve casing 20through the openings 23, or through the open ended tube 17 and will passaround the upper end of the shield 24 adjacent to the valve 21, yet whenthe engine starts and a vacuum is created in the pipe 19, the undersurface oi the shield :21 and the pocket formed hetwccn said shield andcasin 20 is subject vai've casing 20 is'an inclined- I arm 20.

substantially to the vacurm conditions in the manifold as soon as thevalve 21 begins to open.

is due solely to the air blast from the fan 11, further opening movementis due both to the force of the air blast and to the unbalancedpressures on the two sides of the upper half of the valve.

The valve 21 has a stem 25on which is an Connected with the arm 26 is aspring 27 fornormally holding the valve 21 seated or closed. 1 7

It will be seen that my device comprises an attachment in which thetubes 12 and 15 are inserted between the carbureter and intake manifoldand the other parts are connected therewith in the manner hereinbeforedescribed, so that the device may be applied on various makesof" cars byslight'alterations or adjustments.

In the practical operation of the device the sprin 27 is secured inposition so as to hold the valve 21 seated until certain pressure occursagainst the valve 21. I hereupon the pressure of air through the tube 17will engagethe unprotected side of the valve 21 and tend to open thevalve. The greater the air pressure the greater will be the openingmovement of the valve, and the greater will be the supply of airfurnished to the fuel n'iixture. On account of the mix- I ing devicehereinbefore described, comprising the tubes 12 and 15 it will be seenthat the air assing from the tube 15 through the openings 16 in the tube12 will be thoroughly mixed with the fuel mixture.

The advantages of .an auxiliary air supply device of this general natureare more fully set'forth in my co-pending application SerialNumber215,41 l.

; Son e changes may be made in the con struction and arrangement of thevarious parts of my improveddevice without de parting from the essentialfeatures and purposes of my invention, and some changes 'will be made inadjusting the device for use with different cars, and it is my intent tocover by my claims any modifications of structure or use of mechanicalequivalents which may be included within the scope of said claims.

It will readily be seen that the spring 27 may be located at differentplaces for accomplishing the purpose, and that other changes 'mlght bemade.

It will be obvious with this device, that the warm air and vapors forfuel mixture After the initial opening movemetnt which 3.Ina

.In the end of the flaring member 18 is a screen 18 for keeping dirt andthe like out 0f the tube 17. e

The holes 23 permit a movement-of the air through the tube 17 evenbefore the air pressure is great enough to open the valve 21.

I have shown in Fig. 2, a small pipe.

28 communicating with the pipe 19 and designed 'to be connec. ed withthe vacuum feed tank forming part of the fuel system of a motor vehicle.v I

I claim as myinvention:

1. An auxiliary air attachment for motor vehicle engines'comprisingmeans for conducting air to the fuel supply of such engines, a flaring/iend, a valve casing, a butterfly valve therein, a shield for protectinga portion offsaid butterfly valve from contact with blasts of airpassing throu h said air supply, tube to said first described tubes,means for yieldingly holding said valve in its seated or closedposition, said casing being provided with openings in its wall adjacentto said valve on the side of said casing opposite said shield, and onthe side of the valve adjacent to the intake end of the valve casing.

2. In a device of the class described, means for supplying auxiliary airto the fuel mixture of an explosive engine, .said' said means includinga tube having means including an air supply tube, a valve casingcommunicating therewith, a butterfly valve mounted in said casing, aseat for the edge of said butterfly valve for approximately one-half ofits circumference, a shield and guide device adapted to protect aportion of said butterfly valve from contact with lasts of air passingthrough said tube and for guiding said air against an other portion ofsaid valve.

evice of the class described, a fuel mixture conducting tube, anauxiliary air supply tube arranged in communication with saidfirst\tube, a valve casing arranged in the path of\air' passing throughsaid air supply tube, a butterfly valve in said casing, an inclinedshield for protecting sub. stantiall'y one-half of Said butterfly valveEDWARD e. HODGES.

